Which of the following is an example of a secondary metabolite?
A. Toxin produced by species of Clostridium
B. Lactic acid made during yogurt production.
C. Alcohol produced by Saccharomyces during fermentation
D. All of these are secondary metabolites.
Answer: A
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Mobile bits of DNA that can jump from one location on a chromosome to another location are called
A. simple sequence repeats. B. transposons. C. exons. D. introns. E. pseudogenes.
During breakdown of fatty acids, carbons are removed ________ at a time with each turn of the cycle, and two carbon units are released as ________.
A. one; methane B. two; acetyl-CoA C. two; ethanol D. one; carbon dioxide
Answer the question using the accompanying figure. At which point in this action potential diagram does the K+
channel close to stabilize the membrane potential?
a. A b. B c. C d. D e. E
Which important finding from the fossil record supports the theory of evolution?
a. Life has evolved over time. b. All life evolved in the ocean. c. Most species are actually extinct. d. There is an inaccuracy in the fossil record. e. Ancient species greatly differed from those alive today.